Started off poorly (as in, had a bad first few days to the season), started hitting the ball much better, then tore some meniscus in his knee and had to have surgery to fix that, as well as having surgery to remove bone chips in his elbow.
Anyways, 2006 is his first full season in pro ball, after playing just 30 games at A+ last year after signing (and he hit the ball very well there as well). At AA to start this year, he hit .288 / .386 / .525 for San Antonio with 2 homers, 6 doubles, and a triple in 59 at-bats with a 7 to 8 BB:K ratio, which is very impressive. Keep in mind that this is within his first few weeks of full season ball at AA.
For some reason, the Mariners sent him directly to AAA Tacoma after his injury. He started off slow in his first few games, though that's to be expected after such a long lay-off and because of a promotion to a new level. He's hit it better lately, but the sample size is still way too small (33 ABs, 8 games) to really say anything about his AAA stats.
That being said, catching in the MiLB's is not very strong.